John, We were running into the same issues on several of our servers (both linux and windows). We discovered it was a password issue. The password for dbsnmp was not right. We altered the password in the database and then in OEM we went to the agent management screen and updated the password there. Hope this helps. John Green Database Administrator IHOP Corp. -----Original Message----- From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Baylis, John Sent: Friday, October 22, 2004 7:34 AM To: oracle-l@xxxxxxxxxxxxx Subject: 10G grid shows database down when it is not Does anyone have a solution for this 10G Grid / agent problem on windows 2000? After installing the 10g agent (10.1.0.2) on various windows 2000 servers, the 10G grid (10.1.0.3) shows the database is up but after about 5 minutes it shows the database as down with error: Failed to connect to database: ORA-12538: TNS:no such protocol adapter (DBD ERROR: OCIServerAttach). The database is not down. The following error appears in the agent trace file (emagent.trc)=20 Process stderr =3D em_error=3DCould not connect to dbsnmp/(DESCRIPTION=3D(ADDRESS=3D(PROTOCOL=3DTCP)(HOST=3Dgenusapp1.canfor= .ca)(Po rt=3D1521))(CONNECT_DATA=3D(SID=3DP92A))) : ORA-12538: TNS:no such protocol adapter (DBD ERROR: OCIServerAttach) This happens with both 9.2.0.4 and 8.1.7.4 databases. Oracle says it is bug # 3512622 but there is no fix at this time. John Baylis Database Administrator Canadian Forest Products Ltd. Vancouver B.C. Canada -- //www.freelists.org/webpage/oracle-l -- //www.freelists.org/webpage/oracle-l